"The TOI-201 system consists of a super-Earth, a warm Jupiter, and a more massive brown dwarf at 5.8-, 53-, and 2,900-day orbital periods, respectively.
The star is 32% bigger and more massive than the Sun.
Also known as HD 39474 and TIC 350618622, it hosts at least three companions: TOI-201b, c and d.
TOI-201d is a rocky super-Earth planet roughly 1.4 times the size of Earth and approximately 6 times Earth’s mass, completing one orbit every 5.8 days.
TOI-201b is a warm-Jupiter exoplanet about half the mass of Jupiter orbiting every 53 days.
TOI-201c is a brown dwarf — the most massive body in the system besides the star, on a wide, highly elliptical approximately 8-year orbit. Its gravitational influence is responsible for most of the system’s dynamic behavior. TOI-201c is also the longest-period transiting object ever to be discovered.
TOI-201c is unique because of its extremely long orbital period (~7.9 years) and its location in a system with two interior planets.
What makes the TOI-201 system special is that the astronomers are actually able to watch it change in real time.
“The planets’ orbits are tilted relative to each other, and because of that, they’re slowly pulling each other into new orientations,” Mireles said.
“This was a surprise, because if planets are been born in the plane of the protoplanetary disk that existed early in the life of the star, they are expected to have aligned orbits, like the planets in the Solar System,” Professor Dragomir said."
SciNews
No surprise.... the TOI-201 system was DESIGNED to be that way.